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@einen 'tutes gtttent @fitte JOHN H. KEYSER, OAF NEW YORK, N. Y.

Letters Patent No. 81,176, dated August 18, 1868.

MODE 0F' ATTAGHING MICA TO STOVE-PLATES.

@te Sthetult referat tu in tiges@ tetten ateut mit making um nt tige sirius.

TO ALL WHOM IT MAY OONCERN:

Be it known that I, JOHN H. KEYSER, of the city of New York, in the county and State of New York, have invented a new and improved Illuminating-Window or Door; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, in which Figure 1 is a front View ofthe improved illuminating-window or door.

Figure 2 is a view oi the back part ofthe removable section of the door` or window.

Figure 3 is an enlarged vertical section, taken centrally through the improved door or window.

Similar letters ci' reference indicate corresponding parts in the several figures.

This invention relatos to an improved mode of applying mica and other` transparent substance to the doors and windows of stoves, for the purpose of affording illumination, and exposing to view the condition of a tire in a stove, without the necessity of opcninga door or window. Such illuminating-doors and windows are most generally appledto base-burning stoves, and under the old mode of fastening in place the mica plates,a great many screw-bolts and nut-fastenings are required, which`add considerable expense and labor to the stoves.

The object of my invention is to provide for applying mica and other transparent plates to stove-doors, and the openings made through stovcplates, by the employment of self-fastening frames, which are adapted to iit around an opening made through a door or stove-plate, and to be secured to thc smfnc by nica-ns of tongue-v and-cye fastenings, as will be hereinafter explained.

To enable others skilled in the art to understand my invention, I will describe one practical mode of carrying it into eiect.

In the accompanying drawings, I have-represented r'ny invention applied to a stove-window, but it will be obvious from the following description that the same principle is applicable to doors for stoves.

C represents a window-t`rame, which is constructed with a plain external face, so that a plato oi mica or glass will lic snugly against it and be held in place by a frame, A. This fra-Lne, A, is constructed with a loop or eye-piece, a, upon its upper edge, and also with a tongue or hook, c, upon its lower edge; it also has a rib or flange, Z2, formed upon its external edge, and raised upon its back face, asshown in iig. 2. 'lho frame C has a tongue,- b', formed upon its upper end, which is adapted for receiving thc loop a on the frame A, and it also 11113 u notch, y, mild@ ,its lower edge for receiving the hooi: e, as clearly shown in iig. 3. The plate, 13,01; mica, or other transparent substance, is ont to tit within the rib b, on the bach ci' frame A, and notched to receive the tongue c on this frame. This plate being adjusted in place upon frame A, the latter is applied to the face yof' the frame C, and the tongue 1) caused to enter the loop a; at the Same tirnc the frame A' is forced downward until the tongue c is seated into its notch g, when this frame will bc securely held in plneo with tho' mico. plate interposed bctweonvthe two frames, and covering the'opcnings through them.

In constructing the fnstenings, theyl may bamade so that they will dran;r the frame A snugly and tightly against the indou-frame, thus preventing casual displacement of the foruier.

It will he seen from the above description,takenl in connection with the accompanyingkdrawings, that the means for securing the mica in its placearc cust with the two frames A C, and that no separate fastening is required. It u'iil also be seen that thc'frameA muy be cast so as to present a very neat and ornamental appearance. It can be malle very light, and of any dcsired'size and shape, according to the sizeiand shape of the opening around 4which it -is designod`to fit. Y.

llaving described In); invention, what I claini as new, and desireto secure by Letters Patent, is-

Providing for securing' transparent plates over openings made through stovc-platesor doors, 'by means of a self-fastening frame, substantially as described.

l JOHN H. .KEYSERL Witnesses:

WILLIAM Tunrou, Wn. F. Huusrox. 

